LED indicators and lamp failure sensing

[RSavage]

Hi All

Are the LED indicators including in the lamp failure sensing?

I'm thinking of fitting one of these: http://www.smidsy.biz/autohazardflasher.php for purely frivolous reasons. However, bod what makes 'em warns that the unit does not operate the flashers if it senses voltage on the supply to either indicator, i.e. if the indicators are being driven by the bike's systems. He and I suspect that the GSA will be passing ~ 5v through all the lamps as a means of failure detection.

Prior to going into the rain and waving a meter at my bike or disconnecting an indicator I thought I'd ask the experts here.

It's a 2011 GSA.

Ta

Richard

 

[Fanum]

Yes, they are.

 

[Fanum]

Double check that though........The LED inserts from various people like NN all list resistors to get the voltage correct, but thinking about it, that could just be to keep the flash rate right

Best check with someone who knows what they're talking about I'm afraid

(or just pull a bulb and find out )

 

[Mr K]

Yes, they are.

Right first time. LED indicators have built in resistors so the "brain" doesn't see a short circuit or reduced resistance and perceive a bulb failure.

Dunno what the OP's gadget is for...but I suspect it'll cause bother.

 

[Wapping]

Dunno what the OP's gadget is for...but I suspect it'll cause bother.

Widget box. Flashes the hazards automatically when it detects heavy braking. Such as slamming on the anchors when failing to observe a fixed speed camera, or when the rider remembers he's forgotten the raspberries from his soft fruit run to Tesco and will definitely get both barrels from SWMBO as and when he plucks up enough courage to go home. Summat like that anyway.

 

[Mr K]

Widget box. Flashes the hazards automatically when it detects heavy braking. Such as slamming on the anchors when failing to observe a fixed speed camera, or when the rider remembers he's forgotten the raspberries from his soft fruit run to Tesco and will definitely get both barrels from SWMBO as and when he plucks up enough courage to go home. Summat like that anyway.

You need to up your medication. Your cynicism is barely controlled.

 

[RSavage]

Widget box. Flashes the hazards automatically when it detects heavy braking. Such as slamming on the anchors when failing to observe a fixed speed camera, or when the rider remembers he's forgotten the raspberries from his soft fruit run to Tesco and will definitely get both barrels from SWMBO as and when he plucks up enough courage to go home. Summat like that anyway.

Almost spot on about the 'both barrels' bit, Wapping. It was Waitrose.

Richard

 

[RSavage]

Right first time. LED indicators have built in resistors so the "brain" doesn't see a short circuit or reduced resistance and perceive a bulb failure.

Dunno what the OP's gadget is for...but I suspect it'll cause bother.

Mr K, I was hoping someone would tell me how the lamp failure detection operates. If it's done by passing a low current through all lamps by means of applying a sub-illumination voltage then the 'widget' won't work. If it's done by monitoring the current during operation, all is well.

Curiously, the method of turning the headlamp off by extended pressing of the indicator cancel button followed by pressing the right indicator button (or some similar sequence that I can't remember) brings up a 'lampf' fault.

Richard

 

[Fanum]

Right first time. LED indicators have built in resistors so the "brain" doesn't see a short circuit or reduced resistance and perceive a bulb failure.

Dunno what the OP's gadget is for...but I suspect it'll cause bother.

The bike has a hazard light function......presumably this is just an inertia switch that triggers those

hmmmm.....no, that wont be it, unless there is a variant for bikes without hazards and one for those with them

Oh I dunno

 

[RSavage]

The bike has a hazard light function......presumably this is just an inertia switch that triggers those

hmmmm.....no, that wont be it, unless there is a variant for bikes without hazards and one for those with them

Oh I dunno

The description on the website is fairly explicit . . .

http://www.smidsy.biz/HazFlasherinstall.pdf

It's an acceleromter which, under the prescribed conditions, applies 12V to the indicator circuits 5 times and then resets.

No distinction is made for bikes with or without hazards. I'm not going to explain how to ensure that it doesn't feed power into the 'brain' of the bike.

Richard

 

[Bendy toy]

The Lampf system monitors the current draw to each bulb. If the current is too low (as happens with normal LEDs) it signals the bulb has failed. An additional resistor in parallel with the LED dumps enough power to look like ordinary bulbs. Its clunky but keeps the Lampf happy.

Edit: Canbus compatible LED lamps have inbuilt resistors to give the line resistance of normal bulbs.

 

[RSavage]

The Lampf system monitors the current draw to each bulb. If the current is too low (as happens with normal LEDs) it signals the bulb has failed. An additional resistor in parallel with the LED dumps enough power to look like ordinary bulbs. Its clunky but keeps the Lampf happy.

Hi Bendy toy, that suggests that that it will allow the accelerometer-thingy to function. Thanks for that.

Cheers

Richard

 

[Wapping]

You need to up your medication. Your cynicism is barely controlled.

Well, RSavage found it near enough an accurate description of the widget box, whose purpose had been troubling you...

Almost spot on about the 'both barrels' bit, Wapping. It was Waitrose.

Richard

PS Your own contribution was judged less satisfactory by the OP, sadly.....

Mr K, I was hoping someone would tell me how the lamp failure detection operates.....

Enjoy your day.